How to list Apache enabled modules?
For more options man apachectl . All these answers can be found just by little google search.
The use of server-info is harder to find via google and gives much more details && the ability to give access to the information to people who don’t have shell access (eg client, web developpers, project managers, . )
man apachectl on Ubuntu 20.04 does not include this option (or others), but the command still works. The man page isn’t that helpful here
Prefix command with sudo e.g. sudo httpd -M if you get errors like local ssl cert not found etc. Its due to permission issue.
Also you can use server-info to get info from remote servers
SetHandler server-info Order allow,deny Allow from 127.0.0.1 xxx.xxx.xxx.xxx You can get list of all enabled Apache modules at http://your.host.example.com/server-info?list
You need to enable the info module:
sudo a2enmod info.load sudo a2enmod info.conf sudo service apache2 restart will provide a long list of modules, and configuration info.
To view from remote servers, you can change the ‘Requires’ option in /etc/apache2/mods-available/info.conf to allow remote servers to view info.
Yes a2enmod is more correct. When I’m editing configs I usually stay with the files and don’t think of the specialty commands that I rarely use.
Okay, it works both ways anyway, in 2.4 (maybe already earlier also?) you also have the a2enconf to symlink files from «conf-available» directory to «conf-enabled» 🙂
On more recent iterations of Debian and Ubuntu there is also the a2query command:
a2query -m authz_host (enabled by maintainer script) ssl (enabled by site administrator) . Usage: /usr/sbin/a2query -q -m [MODULE] -s [SITE] -c [CONF] -a -v -M -d -h -q suppress any output. Useful for invocation from scripts -m [MODULE] checks whether the module MODULE is enabled, lists all enabled modules if no argument was given -s [SITE] checks whether the site SITE is enabled, lists all sites if no argument was given -c [CONF] checks whether the configuration CONF is enabled, lists all configurations if no argument was given -a returns the current Apache 2 module magic version -v returns the current Apache 2 version -M returns the enabled Apache 2 MPM -d returns the Apache 2 module directory -h display this help Module Index
Below is a list of all of the modules that come as part of the Apache HTTP Server distribution. See also the complete alphabetical list of all Apache HTTP Server directives.
See also
Core Features and Multi-Processing Modules
core Core Apache HTTP Server features that are always available mpm_common A collection of directives that are implemented by more than one multi-processing module (MPM) event A variant of the worker MPM with the goal of consuming threads only for connections with active processing mpm_netware Multi-Processing Module implementing an exclusively threaded web server optimized for Novell NetWare mpmt_os2 Hybrid multi-process, multi-threaded MPM for OS/2 prefork Implements a non-threaded, pre-forking web server mpm_winnt Multi-Processing Module optimized for Windows NT. worker Multi-Processing Module implementing a hybrid multi-threaded multi-process web server
Other Modules
mod_access_compat Group authorizations based on host (name or IP address) mod_actions Execute CGI scripts based on media type or request method. mod_alias Provides for mapping different parts of the host filesystem in the document tree and for URL redirection mod_allowmethods Easily restrict what HTTP methods can be used on the server mod_asis Sends files that contain their own HTTP headers mod_auth_basic Basic HTTP authentication mod_auth_digest User authentication using MD5 Digest Authentication mod_auth_form Form authentication mod_authn_anon Allows «anonymous» user access to authenticated areas mod_authn_core Core Authentication mod_authn_dbd User authentication using an SQL database mod_authn_dbm User authentication using DBM files mod_authn_file User authentication using text files mod_authn_socache Manages a cache of authentication credentials to relieve the load on backends mod_authnz_fcgi Allows a FastCGI authorizer application to handle Apache httpd authentication and authorization mod_authnz_ldap Allows an LDAP directory to be used to store the database for HTTP Basic authentication. mod_authz_core Core Authorization mod_authz_dbd Group Authorization and Login using SQL mod_authz_dbm Group authorization using DBM files mod_authz_groupfile Group authorization using plaintext files mod_authz_host Group authorizations based on host (name or IP address) mod_authz_owner Authorization based on file ownership mod_authz_user User Authorization mod_autoindex Generates directory indexes, automatically, similar to the Unix ls command or the Win32 dir shell command mod_brotli Compress content via Brotli before it is delivered to the client mod_buffer Support for request buffering mod_cache RFC 2616 compliant HTTP caching filter. mod_cache_disk Disk based storage module for the HTTP caching filter. mod_cache_socache Shared object cache (socache) based storage module for the HTTP caching filter. mod_cern_meta CERN httpd metafile semantics mod_cgi Execution of CGI scripts mod_cgid Execution of CGI scripts using an external CGI daemon mod_charset_lite Specify character set translation or recoding mod_data Convert response body into an RFC2397 data URL mod_dav Distributed Authoring and Versioning (WebDAV) functionality mod_dav_fs Filesystem provider for mod_dav mod_dav_lock Generic locking module for mod_dav mod_dbd Manages SQL database connections mod_deflate Compress content before it is delivered to the client mod_dialup Send static content at a bandwidth rate limit, defined by the various old modem standards mod_dir Provides for «trailing slash» redirects and serving directory index files mod_dumpio Dumps all I/O to error log as desired. mod_echo A simple echo server to illustrate protocol modules mod_env Modifies the environment which is passed to CGI scripts and SSI pages mod_example_hooks Illustrates the Apache module API mod_expires Generation of Expires and Cache-Control HTTP headers according to user-specified criteria mod_ext_filter Pass the response body through an external program before delivery to the client mod_file_cache Caches a static list of files in memory mod_filter Context-sensitive smart filter configuration module mod_headers Customization of HTTP request and response headers mod_heartbeat Sends messages with server status to frontend proxy mod_heartmonitor Centralized monitor for mod_heartbeat origin servers mod_http2 Support for the HTTP/2 transport layer mod_ident RFC 1413 ident lookups mod_imagemap Server-side imagemap processing mod_include Server-parsed html documents (Server Side Includes) mod_info Provides a comprehensive overview of the server configuration mod_isapi ISAPI Extensions within Apache for Windows mod_lbmethod_bybusyness Pending Request Counting load balancer scheduler algorithm for mod_proxy_balancer mod_lbmethod_byrequests Request Counting load balancer scheduler algorithm for mod_proxy_balancer mod_lbmethod_bytraffic Weighted Traffic Counting load balancer scheduler algorithm for mod_proxy_balancer mod_lbmethod_heartbeat Heartbeat Traffic Counting load balancer scheduler algorithm for mod_proxy_balancer mod_ldap LDAP connection pooling and result caching services for use by other LDAP modules mod_log_config Logging of the requests made to the server mod_log_debug Additional configurable debug logging mod_log_forensic Forensic Logging of the requests made to the server mod_logio Logging of input and output bytes per request mod_lua Provides Lua hooks into various portions of the httpd request processing mod_macro Provides macros within apache httpd runtime configuration files mod_md Managing domains across virtual hosts, certificate provisioning via the ACME protocol mod_mime Associates the requested filename’s extensions with the file’s behavior (handlers and filters) and content (mime-type, language, character set and encoding) mod_mime_magic Determines the MIME type of a file by looking at a few bytes of its contents mod_negotiation Provides for content negotiation mod_nw_ssl Enable SSL encryption for NetWare mod_privileges Support for Solaris privileges and for running virtual hosts under different user IDs. mod_proxy Multi-protocol proxy/gateway server mod_proxy_ajp AJP support module for mod_proxy mod_proxy_balancer mod_proxy extension for load balancing mod_proxy_connect mod_proxy extension for CONNECT request handling mod_proxy_express Dynamic mass reverse proxy extension for mod_proxy mod_proxy_fcgi FastCGI support module for mod_proxy mod_proxy_fdpass fdpass external process support module for mod_proxy mod_proxy_ftp FTP support module for mod_proxy mod_proxy_hcheck Dynamic health check of Balancer members (workers) for mod_proxy mod_proxy_html Rewrite HTML links in to ensure they are addressable from Clients’ networks in a proxy context. mod_proxy_http HTTP support module for mod_proxy mod_proxy_http2 HTTP/2 support module for mod_proxy mod_proxy_scgi SCGI gateway module for mod_proxy mod_proxy_uwsgi UWSGI gateway module for mod_proxy mod_proxy_wstunnel Websockets support module for mod_proxy mod_ratelimit Bandwidth Rate Limiting for Clients mod_reflector Reflect a request body as a response via the output filter stack. mod_remoteip Replaces the original client IP address for the connection with the useragent IP address list presented by a proxies or a load balancer via the request headers. mod_reqtimeout Set timeout and minimum data rate for receiving requests mod_request Filters to handle and make available HTTP request bodies mod_rewrite Provides a rule-based rewriting engine to rewrite requested URLs on the fly mod_sed Filter Input (request) and Output (response) content using sed syntax mod_session Session support mod_session_cookie Cookie based session support mod_session_crypto Session encryption support mod_session_dbd DBD/SQL based session support mod_setenvif Allows the setting of environment variables based on characteristics of the request mod_slotmem_plain Slot-based shared memory provider. mod_slotmem_shm Slot-based shared memory provider. mod_so Loading of executable code and modules into the server at start-up or restart time mod_socache_dbm DBM based shared object cache provider. mod_socache_dc Distcache based shared object cache provider. mod_socache_memcache Memcache based shared object cache provider. mod_socache_redis Redis based shared object cache provider. mod_socache_shmcb shmcb based shared object cache provider. mod_speling Attempts to correct mistaken URLs by ignoring capitalization, or attempting to correct various minor misspellings. mod_ssl Strong cryptography using the Secure Sockets Layer (SSL) and Transport Layer Security (TLS) protocols mod_status Provides information on server activity and performance mod_substitute Perform search and replace operations on response bodies mod_suexec Allows CGI scripts to run as a specified user and Group mod_systemd Provides better support for systemd integration mod_tls TLS v1.2 and v1.3 implemented in memory-safe Rust via the rustls library mod_unique_id Provides an environment variable with a unique identifier for each request mod_unixd Basic (required) security for Unix-family platforms. mod_userdir User-specific directories mod_usertrack Clickstream logging of user activity on a site mod_version Version dependent configuration mod_vhost_alias Provides for dynamically configured mass virtual hosting mod_watchdog provides infrastructure for other modules to periodically run tasks mod_xml2enc Enhanced charset/internationalisation support for libxml2-based filter modules
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